bool IsIdentifierWithinPercentage(ToggleConfig toggleConfig, string identifier)
{
var bytes = hasher.Hash(identifier);
var group = toggleConfig.PercentGroup % bytes.Length;
var result = bytes[group] / 256d;
return result < toggleConfig.Percent;
}
public void When_parsing_a_between_config(string config, string expectedStartString, string expectedEndString)
{
var result = new ToggleConfig(config);
Assert.That(result.ConfigType, Is.EqualTo(ToggleConfigType.Between));
Assert.That(result.StartUtc, Is.EqualTo(DateTime.Parse(expectedStartString).ToUniversalTime()));
Assert.That(result.EndUtc, Is.EqualTo(DateTime.Parse(expectedEndString).ToUniversalTime()));
}
public bool IsFeatureOn(string config, string identifier)
{
var toggleConfig = new ToggleConfig(config);
switch (toggleConfig.ConfigType)
{
case ToggleConfigType.Off:
return false;
case ToggleConfigType.On:
return true;
case ToggleConfigType.Percent:
return IsIdentifierWithinPercentage(toggleConfig, identifier);
case ToggleConfigType.Start:
return HasTimeArrived(toggleConfig.StartUtc);
case ToggleConfigType.End:
return !HasTimeArrived(toggleConfig.EndUtc);
case ToggleConfigType.Between:
return HasTimeArrived(toggleConfig.StartUtc) && !HasTimeArrived(toggleConfig.EndUtc);
default:
throw new NotImplementedException();
}
}
public void When_parsing_a_end_timestamp(string config, string expectedEndString)
{
var result = new ToggleConfig(config);
Assert.That(result.ConfigType, Is.EqualTo(ToggleConfigType.End));
Assert.That(result.EndUtc, Is.EqualTo(DateTime.Parse(expectedEndString).ToUniversalTime()));
}
public void When_parsing_ON(string config)
{
var result = new ToggleConfig(config);
Assert.That(result.ConfigType, Is.EqualTo(ToggleConfigType.On));
}
public void When_parsing_a_percent_with_a_group(string config, double expectedPercent, int expectedGroup)
{
var result = new ToggleConfig(config);
Assert.That(result.ConfigType, Is.EqualTo(ToggleConfigType.Percent));
Assert.That(result.Percent, Is.EqualTo(expectedPercent));
Assert.That(result.PercentGroup, Is.EqualTo(expectedGroup));
}